Exhaust manifold for internal combustion engines



Sept. 21, 1937. E. c. SAINT-JACQUES 3,

EXHAUST IANIFQLD FOR INTERNAL COMBUSTION ENGINES Filed Oct. 29, 1934 INVENTOR jggdaw UNITED STATES PATENT OFFICE EXHAUST MANIFOLD FOB INTERNAL H BUSI'ION ENGINES Eugene Camille Saint-Jacques, Paris, France Application October so, 1934, Serial No. mass In France January 30, 1,84

2 Claims. (Cl. 181-58) The present invention has as its subject an to maintain a constant gyratory movement oi exhaust manifold for internal combustion en the same direction for the gases introduced. gines permitting the removal oi the exhaust There are thus not produced at any point of gases to be regularized in order to suppress noise the device shocks which stop or slow or which 5 without loss of power. change the direction of the gases. The move 5 To obtain these results it is proposed. accordment or these is gyratory at the inlet into the ing to the present invention, firstly to arrange exhaust chamber and it remains sufllcient at the exhaust manifold so that the gases may take the outlet into the surrounding air so that there up a gyratory movement after their leaving the will not be violent shocks.

combustion chambers oi the engine. Due to this arrangement, the noise of the ex- 10 Up till now the exhaust ducts from the cylinhaust is suppressed, a silent exhaust is produced ders oi the engine have been radially connected but losses of charge aflecting the yield 0! the to the exhaust manifold so that the gases entered engine are not observed. at the axis of this manifold and were sharply It should be noted that the vanes i! may deviated towards the silencer; there resulted readily be mounted in a rigid manner without 15 from this in particular a considerable loss 01' the intervention of members which hinder the charge. circulation of the gases and develop sound.

According to the present invention the said I claim:- ducts are connected to the manifold so that the 1. An exhaust manifold ior an internal comgo gases are admitted to this latter tangentially. bust-ion engine, comprising a cylindrical casing Inside the manifold there are moreover aropen at one end and closed at the other, a tanranged,preierably between each cylinder and the gential tube opening into said casing ior the adjacent cylinder, rings of vanes which direct admission of exhaust gases from the cylinder of the gases towards the axis of the manifold and the engine, whereby the gases are given a spiral give them a more regular spiral movement withmovement when entering the casing, and a ring 25 out retarding this movement of the gases but comprising a plurality oi helical vanes within while suppressing the noise of the exhaust. the casing between the tangential tube and the The attached drawing shows a non-limiting open end of the casing, whereby the spiral example of an embodiment oi the invention. movement of the gases is increased during the Figure 1 is a view partly in plan and partly movement from the tangential tube toward the 30 in section, the section portion being along the open end of the casing.

line I-I of Figure 2; 2. An exhaust manifold for a multi-cylinder Figure 2 is a section along the line 11-11 of internal combustion engine, comprising a cylin- Figure l; and drical casing open at one end and closed at the 85 Figure 3 is an enlarged section along the line other, a plurality of tangential tubes opening into III-III of Figure 1 showing the ring of vanes. said casing for the admission of exhaust gases In the drawing there is shown an exhaust from the cylinders 01' the engine, whereby the manifold it to which the exhaust ducts ll of gases are given aspiral movement when entering the engine are connected tangentially. Rings of the casing, a ring comprising a plurality of helivanes I2 arranged so as to direct the gases tocal vanes within the casing between the first 40 wards the axis of the manifold without obstructtangential tube a de ope en o th osi e. ing the spiral movement of the gases but while a similar ring or vanes in the casing between suppressing the noise oi the exhaust are arranged lmnt lillll h lfi tubes. r y h 9111-1 in the maniiold between each duct ii and the mWement 0f the 8 18 incremd durini the as m t movement from the tangential tubes toward the In these diii'erent rings of vanes it these vanes end M the cam!- overlap and all have the same inclination so as EUGENE m Q ES- 

